Support code for peripherals (initially, speaker LEDs).

A tool that detects if the battery is connected and if the charge is too low, to power off the kit. See the file bin/kano-boot-battery for details.

WARNING

• APIs are considered unstable for the Kano OS 2.1 release.

This is because we may want to introduce a daemon, and the design of this will influence the API. Currently the API requires root, but this won't be necessary if we have a daemon.

Access should be via the kano-speakerleds binary.

This module will turn off the kit automatically on boot if the battery is too low. A warning message will be displayed on the console, and afterwards the kit will turn itself off.

There are 3 ways to test this functionality:

• Letting the battery run low, which is not practical most times
• Interactively from a terminal, with sudo kano-boot-battery --dry-run, no reboot will take place
• Faking low battery signal with sudo kano-boot-battery --enable-test && sudo reboot

When faking the low battery signal, it should run the test on next reboot and then return to normal boot to Dashboard.